Study of Mechanical Properties of 7075 Aluminum Alloy Due to Particle Size Reduction due to Constrained Groove Pressing CGP Process
الموضوعات :Shahin Heidari 1 , Ahmad Afsari 2
1 - Bone and Joint Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
2 - Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, P. O. Box: 71348-14336, Shiraz, Iran
الکلمات المفتاحية: Mechanical Properties, 7075 aluminum alloy, Constrained Groove Pressing Process, Ultrafine-grained Materials,
ملخص المقالة :
Today, one of the new approaches of researchers to produce materials with very fine grains is the application of severe plastic deformation on the prototype with coarse grains. In this method, the grain size is reduced to the nanometer scale in several stages through applying strong strains to the sample, which leads to the improvement of mechanical and physical properties in the material. One of the most important methods of applying severe plastic deformation is the constrained groove pressing (CGP) process. According to studies, little research has been done on the weight loss of structures used in the military, maritime, aviation, and medical industries. Therefore, the mechanical behavior of the sheets was experimentally studied by the CGP method. The results show that the structure of 7075-T6 aluminum particles decreased in size from 60 microns to 270 nanometers by increasing the steps of this process. Also, the yield strength in the fourth pass increased by 38% compared to the annealed sample, and the tensile strength improved by 34%. In addition, the percentage of longitudinal increases in the fourth pass is reduced to its lowest value, ie 40%.
[1] Zhilyaev, A.P. and Langdon, T.G. 2008. Using high-pressure torsion for metal processing: Fundamentals and applications. Progress in Materials science. 53(6):893-979.
[2] Ross, C.T. 2005. A conceptual design of an underwater missile launcher. Ocean Engineering, 32(1):85-99.
[3] Bai, X. 2013. Mineral image enhancement based on sequential combination of toggle and top-hat based contrast operator. Micron. 44:193-201.
[4] Naizabekov, A.B., Andreyachshenko, V.A. and Kocich, R., 2013. Study of deformation behavior, structure and mechanical properties of the AlSiMnFe alloy during ECAP-PBP. Micron. 44: 210-217.
[5] Xuebao , Z. D. 2011. Research on as-cast microstructures and properties of 3004 aluminum-manganese alloy. Journal of North University of China (Natural Science Edition). 32(4):523-528.
[6] Heidari, S., Afsari, A. and Ranaei, M.A. 2020. Increasing Wear Resistance of Copper Electrode in Electrical Discharge Machining by Using Ultra-Fine-Grained Structure. Transactions of the Indian Institute of Metals. 73(11): 2901-2910.
[7] Sieber, H., Wilde, G. and Perepezko, J.H. 1999. Thermally activated amorphous phase formation in cold-rolled multilayers of Al–Ni, Al–Ta, Al–Fe and Zr–Cu. Journal of Non-Crystalline Solids. 250:611-615.
[8] Shin, D.H., Park, J.J., Kim, Y.S. and Park, K.T. 2002. Constrained groove pressing and its application to grain refinement of aluminum. Materials Science and Engineering: A. 328(1-2): 98-103.
[9] Hajizadeh, K., Ejtemaei, S. and Eghbali, B. 2017. Microstructure, hardness homogeneity, and tensile properties of 1050 aluminum processed by constrained groove pressing. Applied Physics. A, 123(8):1-9.
[10] Fujda, M. and Kvacaj ,T. 2007. Microstructure and mechanical properties of EN AW 6082 aluminium alloy prepared by equal-channel angular pressing. Journal of Metals. Materials and Minerals, 17(2):23-27.
[11] Thangapandian, N., Balasivanandha Prabu S., Padmanabhan K.A. 2002. Effects of die profile on grain refinement in Al–Mg alloy processed by repetitive corrugation and straightening. Materials Science and Engineering: A, 649: 229-238.
[12] Borhani, M. and Djavanroodi, F. 2012. Rubber pad-constrained groove pressing process: Experimental and finite element investigation. Materials Science and Engineering: A, 546:1-7.
[13] Afsari, A., Ramezani, M., Heidari, S. and Karimi, J. 2020. Imperialist Competitive Algorithm (ICA) Approach for Optimization of the Surface Grinding Process. Journal of Modern Processes in Manufacturing and Production. 9(1): 51-62.
[14] Afsari, A., Heidari, S. and Jafari, J. 2020. Evaluation of Optimal Conditions, Microstructure, and Mechanical Properties of Aluminum to Copper Joints Welded by FSW. Journal of Modern Processes in Manufacturing and Production. 9(4): 61-81.
[15] Peng, K., Zhang, Y., Shaw, L.L. and Qian, K.W. 2009. Microstructure dependence of a Cu–38Zn alloy on processing conditions of constrained groove pressing. Acta Materialia. 57(18): 5543-5553.
[16] Rahimi, F., Mohammad, S.B. and Ahmadi, M. 2014. A comparative study between deformation behavior of pure Aluminum in CGP and RCS by finite element analysis. Metallurgical Engineering. 17(53):25-32.
[17] Wang, Z.S., Guan, Y.J., Wang, G.C. and Zhong, C.K. 2015. Influences of die structure on constrained groove pressing of commercially pure Ni sheets. Journal of Materials Processing Technology. 215: 205-218.
[18] Handbook, A.S.M. 1990. Properties and selection: irons, steels, and high-performance alloys. ASM international 1:140-194.
[19] Park, J.K. and Ardell, A.J. 1983. Microstructures of the commercial 7075 Al alloy in the T651 and T7 tempers. Metallurgical Transactions A. 14(10):1957-1965.
[20] Heidari, S., Bakhshan, Y., Khorshidi Mal Ahmadi, J. and Afsari, A. 2019. Investigating the Behavior of Aluminum 7075 under the Process of CGP as the Fin of Space Structures. Modares Mechanical Engineering, 19(5):1187-1197.
[21] Designation: B918-01, Standard Practice for Heat Treatment of Wrought Aluminum Alloys. 2003. The Annual Book of ASTM Standards. Section 03. ASTM International, United States.
[22] Shirdel, A., Khajeh, A. and Moshksar, M.M. 2010. Experimental and finite element investigation of semi-constrained groove pressing process. Materials & Design. 31(2): 946-950.
[23] Designation: B918-01, Standard Practice for Heat Treatment of Wrought Aluminum Alloys. 2003. The Annual Book of ASTM Standards. Section 03. ASTM International, United States.
[24] Quan, G.Z., Li, G.S., Wang, Y., Lv, W.Q., Yu, C.T. and Zhou, J. 2013. A characterization for the flow behavior of as-extruded 7075 aluminum alloy by the improved Arrhenius model with variable parameters. Materials Research. 16(1):19-27.
[25] ASTM International. 2016. E8/E8M-16a: Standard Test Methods for Tension Testing of Metallic Materials. ASTM international.
[26] ASTM, E. 1999. 384-99. Standard Test for Micro indentation Hardness of Materials, ASTM International.